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热轧带钢轧后冷却过程中卷取温度的控制精度是保证带钢组织性能、表面质量和板形良好的1个关键因素。温度控制的核心是冷却过程控制模型的建立及其自适应反馈功能。建立了具有非线性结构特征的热轧带钢冷却过程控制的数学模型,并对新模型的智能反馈控制方法进行了研究,增强了控制模型的自适应性。现场实际应用表明:实测卷取温度与目标温度相差±5℃以内的带钢占全长的85%,相差±10℃以内的带钢占全长的98%,该冷却数学模型的卷取温度控制能达到较高的精度,为提高产品质量奠定了基础。
The control accuracy of the coiling temperature in the hot strip rolling after cooling is a key factor to ensure the microstructure and properties, surface quality and shape of the strip. The core of temperature control is the establishment of the cooling process control model and its adaptive feedback function. The mathematical model of the cooling process control of the hot-rolled strip with non-linear structural features was established. The intelligent feedback control method of the new model was studied and the self-adaptability of the control model was enhanced. The practical application in the field shows that the strip with the difference between ± 5 ℃ and the actual coiling temperature is 85% of the total length and the strip with the difference of ± 10 ℃ occupies 98% of the total length. The coiling temperature of the cooling mathematical model Control can achieve higher accuracy, to improve product quality and laid the foundation.